Rotary duplicator.



. PATBNTED 001-23, 1906. J. STEEL. \ROTARY DUPLIOATOR.

APPLICATION FILED JAN. 27. 1906.

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UNITED sTATEs JAMES STEEL, or LITTLE FALLS, NEW JERSEY.

ROTARY ,DUPLICATOR-H Specification of Letters Patent.

Application filed January 2'7, 1906. Serial No. 298,14 4.

Patented Qct.\23, 19Q6,

To aJZZ it may concern; Be is known that I, J AMES STEEL, a citize ofthe United States, and a resident of Little Falls, Passaic county, Stateof New Jersey have invented certain new and useful Ira-' prQ'Vements inRotary Duplicators, of which the'following is a specificationaccompanied by drawings. I

This invention'relates to stencil-printing machines," more particularlyto a machine in the form of a rotary duplicator; and the ob"- jects ofthe "inventionare to improve upon the construction of such machines,increase their efliciency with simplicity of parts which are not liableto get out of order, and enable the parts to be more readily adjustedthan heretofore.

Another object oflthe invention is to im'' prove upon the means forsecuring the'pad or screen and the stencil-sheetupon the stencilprintingdrum so that'one ma be secured upon the drum or moved there om withoutinterfering with the other.

AccordingtO this invention also the entire drum may be readily removedfrom its bearings and placed therein without interfering with theremaining parts ofthe machine.

Further objects of the invention will hereinafter appear; andto theseends'the invention consists of a stencil-printing machine in the form ofa rotary duplicator-for carrying out the above objects embodyingthe'features of construction, combinations of elements. and arrangementof parts having the general mode .of o eration substantially ashereinafter fully escribed and claimed in this specification and shownin the accompanying rawings, in which 1 Figure 1 is a front elevation ofa machine embodying the invention, partly broken away. Fig. 2 is anelevation of one end of the machine; and Figs. 3, 4', 5, and 6 areenlarged detail views of the drum-bearings.

Referring to the drawings, A represents the base of the machine, and Bthe frames or standards which support the 'stencil printing drum C andthe pressure-roller D, which coov crates with the drum. In this instancet e drum .comprisesthe trunnions F, operating in the bearings E, and theheads orends G, connected by the perforated diaphragm or body portion H,upon which the pad orscreen I and the stencil-sheet J, are suitablysecured, while the ink is applied to the interior of the drum in theusual manner.

As shown in the drawings, a slot K extends longitudinally of the drum,and a longitudinal rod g, in this instance shown triangular,

is made to substantially fill the top of the slot IK, said rod beingheld in position by another rod L, which passes longitudinally throughthe triangular rod g. The rod L is preferably bent in the shape of ahook at both ends,

which are to fit in holes Z in the frame 0. The triangular-shaped rod gand the bent rod L are held in the longitudinal slot K b means of thesprings 0, connected to the pins P on the heads G of the drum and to thepins p on the bent rod L. The rods g and L are for holdingthe'stencil-sheet in position on the drum. The rod L, carr ing the rodcan be moved out of the slot and revolved about the pivots at 1 until itcomes in contact with ,the pin f in the frame 0. The rod L is then heldopen by the spring 0, thus allowing the stencil-sheet to be put on orremoved. After the stencil-sheet has been put on and the rods put inplace, as shown in the drawings, it will be noticed that the peripheryof the drum is smooth and uniform and that the opening of thelongitudinal slot in the drum has been substantially covered by the rodg.

' In orderto hold the screen or ad on the drum, sprin -clips Q areprovide extending ends R, which enter the holes S on the heads of thedrum, whereby the clips are held on the drum; Preferably the shouldersor corners of the slot K are hollowed, as at T, order to accommodate andhold the springclips Q.

According to the construction described, the ends-of the pad I are firstinserted under the spring-clips Q, and then the stencil-sheet J isplaced upon the drum and the ends thereof secured under the longitudinalrod on the rods W, pivoted at X on the frames B and bearing at theirother ends upon the fingers Y, carried by the longitudinal rod Z,pivoted at each end at a in the frames B. At one end of the rod Z issecured an arm I), having a pin a at its outer end, adapted to 006 eratewith the apertures d on one of t 1e frames B, so that the angularposition of the arm I) may be adjusted vertically to press the roller Dmore or less strongly against the drum C.

The trunnions F on the drum C are removably supported on the frame B bymeans of a healing or outer sleeve E, said sleeve having a slot 1 at itsside, into which the trunnions F are placed. Inside the outer sleeve Eis an inner locking-sleeve 6, provided with a slot 3. To the innersleeve is attached a short operating-lever 4, a slot y being made in theupper part of the outer sleeve for the operation of the lever 4.

Fig. 4 shows the inner locking-sleeve e in a .position to receive thetrunnlon F of the drum, both slots 1 and 3 being coincident.

Figs. 5 and 6 show the inner locking-sleeve 6 closed and locking thetrunnion.

In Fig. 3, which represents a top view of the bearing, a small spring 2is shown in the slot y, said spring being fastened at its center by thescrew 2, the outer ends of the spring being curved, as at i, so as tohold the lever t at its extreme positions.

The crank g is fastened to one of the trunnions F of the drum C by meansof the screw h.

On the inside of the frame B are two lugs 5 and 6, attached thereto forthe purpose of supporting the end of a board or table on the rotaryduplicator.

The board or table is held in place by pins 8 on the lugs 5 ,which fitinto holes on the bottom of the board or table 7, as shown in Fig. 2.- jThe board or table so placed affords a suitable guide for the paper asit is fed'between the drum and the pressure-roll.

The construction of the bearings of the trunnions above described can bevaried without departing from the general mode of operation.

Obviously some features of this invention may be used Without others,and the invention may be embodied in widely-varying forms.

Therefore, without limiting the invention to the devices shown anddescribed and Without enumerating equivalents, I claim, and

2. In a rotary duplicator, thejcombination with the drum, of means forsecuring the pad and stencil-sheet in a longitudinal slot on the drum,means for substantially filling the longitudinal slot and means forholding said securing means in operative and inoperative positions.

3. In a rotary duplicator, the combination with a drum of longitudinally-extending elastic means independent of each other for securing the ador screen and the stencilsheet respectively to the drum, and means forholding both of said elastic means in an operative and inoperativeposition.

4. In a rotary duplicator, the combination I with a drum, of means forsecuring the ends of the pad thereto, and means independent of saidfirst-named means for securing the stencil-sheet thereto and forcovering said securing means, said securing means being pivotallysecured at their ends to the heads of the drum.

6. In a rotary duplicator, the combination with a drum, of devices forsecuring the ends of the pad or screen thereto and pivoted at the endsto the heads of the drum, means independent of said pad-securing devicesextending continuously across the drum for securing the ends of thestencil-sheet thereto, means for holding said pad and stencil-sheetsecuring devices in an operative and inoperative position, and means forsubstantially covering the securing devices on the periphery of thedrum.

7. In a rotary duplicator, the combination With a drum, of spring-clipsextending longitudinally thereof and pivoted. at the ends to the headsof the drum for securing the ends of the pad or screen thereto, meansindependent of said clips extending continuously across the drum forsecuring the ends of the stencilsheet thereto, and means forsubstantially covering the securing devices on the periphery of thedrum.

8. In a rotary duplicator, the combination with a drum, oflongitudinallyextending elastic means independent of each other forsecuring the pad or screen and the stencilsheet respectively to thedrum, said means being pivoted at the ends to the heads of the drum, andmeans for substantially covering the securing devices on the peripheryof the drum.

9. In a rotary duplicator, the combination with a drum, of a longitudmalslot in the periphery thereof, spring-clips arranged at the corners ofsaid slot for holding the pad or screen on the drum, and aspring-pressed rod lying in said slot for holding the ends of the 5. Ina rotary duplicator, the combination stencil-sheet to maintain the sheet"'on the drum and means for substantially covering the securing deviceson the periphery of the drum. r

10. In a rotary duplicator, the combination with a drum, of alongitudinal slot in the periphery thereof, means arranged at the sidesof said. slot for holding the pad or screen on the drum and a rod insaid slot for holding the ends of the stencil-sheet to maintain thesheet on the drum, means for holding said pad and stencil-sheet securingmeans in an operative and inoperative position, and means forsubstantially co vering the securing devices on the periphery ofthedrum.

11. In a rotary duplicator, the combina- 'tion-With a drum, of alongitudinal slot in the and inoperative position, and meansfor'substantially covering the securing devices on the periphery of thedrum.

In testimony whereof I have signed this specification'in the presence oftwo subscribing witnesses.

I JAMES STEEL.

Witnesses:

O. W. MATCHES, B. A. STANLEY.

